So after many hours of examination of the new tents that are currently available from a myriad of manufacturers, I gave up and turned to eBay. I am now the proud owner of a second Sierra Designs "Lookout" tent, this one from 1996. Cost was $100.79 + shipping. It's a slightly updated version of my 1992 model. Arrived in good condition. I'm pretty happy with it.

I think it's weird that the only tents that can be sealed up these days are the hard core, expedition-worthy 4-season tents. Must be global warming.